Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f38b43bb4cc7ab…

MALICIOUS

PDF

46.1 KB Created: 2020-08-30 19:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a14207fb72abb253a96abeb4f819d3eb SHA-1: 7f40a01397c908454bf5ac29b7028350307f57ff SHA-256: 00f38b43bb4cc7abd5a89dfe17abe3d87d0f6b277195c6c16600fcc4866f1bc3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body and heuristics indicate a lure, potentially for a password-protected archive, which is a common tactic to bypass security gateways. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wix?keyword=nautiz+x5+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/17961295956.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/sozevudetoxuxeditujikigol.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/37205068838.pdf
    • https://cdn.shopify.com/s/files/1/0428/5304/0295/files/10996311178.pdf
    • https://static.usrfiles.com/ugd/4c1554_f20d7e4a2c874a08ab014929e3fb6781.pdf
    • https://static.usrfiles.com/ugd/b8c837_770bf3c3d14943f8bd9de74929a16c86.pdf
    • https://static.usrfiles.com/ugd/9c43ec_ed2814be145643f69d0348d4860fb9c2.pdf
    • https://static.usrfiles.com/ugd/0e9fc2_d1b6ba2232c14ba18cdd3aac44a60ce3.pdf
    • https://static.usrfiles.com/ugd/1f5cef_05e90699d323458a9d75745f35115f2c.pdf
    • https://cdn.shopify.com/s/files/1/0437/2742/1608/files/1210844451.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/93893587489.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/the_early_medieval_church_in_the_west.pdf
    • https://cdn.shopify.com/s/files/1/0436/3960/3360/files/61718604581.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6166/files/rewetamawusedezezu.pdf
    • https://static.usrfiles.com/ugd/b8c837_d6709bc75bdb48f1aad4cab8ec6c77ee.pdf
    • https://static.usrfiles.com/ugd/b8c837_a138b527534a4d16bf2794502b629a3b.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000771e.bin
74cd8147e09c170a1d7653848dcea23752fd8832162540f6aedcae314c9cf33a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x771E 4768 bytes
font_01_sfnt_off00008757.bin
2d47a4d0a549363ce0548f80919c2814a017e51a34158555c2a7bade14941cd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8757 10612 bytes

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